[Bug target/79481] AVX512PF: unmasked gather prefetch intrinsics missing

[wenzel@mitsuba-renderer.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79481

--- Comment #4 from Wenzel Jakob <wenzel@mitsuba-renderer.org> ---
I think that's right. Clang e.g. also does this:

#define _mm512_prefetch_i32gather_ps(index, addr, scale, hint) ({\
  __builtin_ia32_gatherpfdps((__mmask16) -1, \
                             (__v16si)(__m512i)(index), (int const *)(addr), \
                             (int)(scale), (int)(hint)); })